Connecting device.



F. H. CHAPMAN & '0. E. KBNNEY.

CONNECTING DEVICE.

APPLICATION FILED IVAN. s, 1913.

LS. Patented Feb. 10, 1914.

fig/21 /5 INVENTO Rs 44Tnn sfmrns r rnlelnnpgfrrnnnnn owen, annulant, or Toirano, OHIO, nssreivons To THE YOsTXLECTRIo MANUFACTURING COMPANY, or TOLEDO, OHIO, A CORPORATION CONNECTING DEVICE Specification of Letters Patent.

Patented Feb. 16,1914.

v l .I Y Application filed January 6, 1913. Serial No. 740,457.

being had to the accompanying drawings,

and to the characters of Ireference marked thereon, which forma part of this specification.

This invention relates particularly to connecting devices for electric circuits, but is not restricted to such use as it may be used in any connection for which it may be adapted or appropriate.

The object of our invention is to simplify and improve upon the construction of connecting devices of this character, whereby to enhance the practicability and commercial value thereof.

rlhe invention is fully described in the following specification, and while, in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in whichn Figure 1 is a side elevation of a device embodying the invention, with the plug member in central longitudinal section and the socket member in partial section, and with the members in released positions. Fig. 2 is a similar View thereof with the members in engaged positions. Fig. 3 is a crosssection on the line -m in Fig. 2,'and Fig. 4 is a side elevation of the plug member.

Referring to the drawings, 1 designates a socket member of customary or any suitable form hei/'ing the central contact 2' and the threaded oi' spirally grooved socket lining 3. The plug member of the connection comprises .the body part et, which is provided with a longitudinally extending socket 5 opening without the outer or free end there oit', and the plunger 6, whichis mounted for free reciprocatory movements within the socket One or `more coiled compression Springs 7 the plug socket 5 and the plunger tocause are disposed between the base ofthe plunger to normallyproject without the eiidf of such socket, as shown in Fig. 1.

The plunger 6, in the present instance, has longitndina-lly-extending conductor-bars or strips S and Sisecured thereto by-sci'ews 10,v

or in any other suitable manner, and atytached at their inner end portions to lead-in wires 11i and 12, respectively, which wires enterthe socket 5 througl'i a restricted opening llinthe plug part 4L.v The conductorbar S has its outer end bent across the outer end of the plunger in position to engage the socket contact 2 when the plug is' inserted into the socket member, as shown in F ig. l. The other conductor-bar 9, has its forward 'or outer end portion oiset relative to its inner end portiontransvers'ely of the plunger, as at 9, and inwardly tapered at its vinner end to adapt it tocoact with a contact block 1i to force it outward when the plunger is moved inward relative to the plug from its normally extended position, as shown in Fig. 2.

' The block 14 is of segmentalv form and works ina slot 15 disposed transversely of the plug through a side wall of the socket 5 in register with the conductor-bar 9. The

'radial or inward and outward movements of the block are limited by pins 1.6, which' extend across the slot 15 through slots 1'( in the block. The outer edge of the block 14 is complemental to the threads or spiral grooves of the socket lining 3 to adapt it to interengage therewith when projected from the plug, as shown in Figs. 2 and 4f.. The longitudinal movements orl the plunger 6 relative to the plug part la are limited 'by a pin 1S projecting from the plunger and working in a registering slot 19 in said part.

To lirmly engage and make electrical connection between a plug embodying the invention and .i socket it is only necessary to insert the plug into the socket until the plug contact 8 engages the socket contact 2, whereupon a continued inward movement oitl the plug forces the plunger therein against the influence of the springs 7 and eiiects an outward movement of the contact block 1l- .into engagement with the threaded interior gether. This manner of cdiinecting the plug -and socket is foundA in practice to bevei'y etficient in its action, andV is also simple and Ainexpensive of construction, and Vadmirably adapted as a quick connecting device for elect-ric light circuits and the like.

It is to be understood that the invention is not limited to any specific construction or arrangement of the parts except in so far as such limitations are specified in t-he claim.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is,-

A plug having a socketed body part with an opening in its socket wall, an arcuate block carried by the body part Within said opening for radial movements relative thereto, said block being spirally disposed relative to the body part and forming a segment of a screw thread, a plunger Working in said socket axially thereof and normally standing in outwardly projected relation thereto, said plunger having a longiy tapered portion, said strip being in register'- with said block, and the tapered and outer end portions thereof being adapted to coact .with the block to force it outward and to hold it in such position when the plunger is moved inward from normal position, sub stantially as described.y

In testimony whereof, we have hereunto signed our names to this specication in the presence of tWo subscribing witnesses.

FRANK H. CHAPMAN. OWEN E. KENNEY. Witnesses:

Gno. F. MILLER, Jr., 'DA RICKET.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

